/* ============================================
   郑阅书房 - Global Styles
   ============================================ */

@import 'variables.css';

/* === Reset === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
}

a {
  color: inherit;
  text-decoration: none;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  font-size: inherit;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

ul, ol {
  list-style: none;
}

/* === Container === */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
}

/* === Header === */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  height: var(--header-height);
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
}

.header-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
  display: flex;
  align-items: center;
  gap: 32px;
}

.header__logo {
  font-family: var(--font-heading);
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
  white-space: nowrap;
  flex-shrink: 0;
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 28px;
  flex: 1;
}

.header__nav a {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition-fast);
  white-space: nowrap;
}

.header__nav a:hover,
.header__nav a.active {
  color: var(--color-primary);
}

.header__search {
  display: flex;
  align-items: center;
  gap: 8px;
  background: #F5F5F4;
  border-radius: var(--radius-full);
  padding: 8px 16px;
  flex: 1;
  max-width: 320px;
}

.header__search img {
  width: 18px;
  height: 18px;
  opacity: 0.5;
}

.header__search input {
  border: none;
  background: transparent;
  outline: none;
  width: 100%;
  font-size: 14px;
  color: var(--color-text);
}

.header__search input::placeholder {
  color: var(--color-text-light);
}

.header__cart {
  position: relative;
  flex-shrink: 0;
}

.header__cart img {
  width: 30px;
  height: 30px;
}

.header__cart-badge {
  position: absolute;
  top: -6px;
  right: -8px;
  background: var(--color-primary);
  color: white;
  font-size: 11px;
  font-weight: 600;
  min-width: 18px;
  height: 18px;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
}

/* === Footer === */
.footer {
  background: var(--color-dark);
  color: var(--color-text-light);
  padding: var(--space-4xl) 0 var(--space-xl);
}

.footer-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--content-padding);
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-3xl);
}

.footer__brand h3 {
  color: var(--color-white);
  font-size: 22px;
  font-family: var(--font-heading);
  margin-bottom: var(--space-md);
}

.footer__brand p {
  font-size: 14px;
  line-height: 1.8;
  max-width: 300px;
}

.footer__col h4 {
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.footer__col a {
  display: block;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
  transition: color var(--transition-fast);
}

.footer__col a:hover {
  color: var(--color-primary);
}

.footer__bottom {
  max-width: var(--max-width);
  margin: var(--space-2xl) auto 0;
  padding: var(--space-lg) var(--content-padding) 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-weight: 600;
  font-size: 15px;
  border-radius: var(--radius-lg);
  padding: 12px 28px;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: white;
}

.btn--primary:hover {
  background: var(--color-primary-hover);
}

.btn--outline {
  border: 2px solid var(--color-primary);
  color: var(--color-primary);
  background: transparent;
}

.btn--outline:hover {
  background: var(--color-primary);
  color: white;
}

.btn--ghost {
  color: var(--color-text-muted);
}

.btn--ghost:hover {
  color: var(--color-primary);
  background: var(--color-primary-bg);
}

.btn--lg {
  padding: 16px 36px;
  font-size: 17px;
  border-radius: var(--radius-lg);
}

.btn--sm {
  padding: 8px 16px;
  font-size: 13px;
  border-radius: var(--radius-sm);
}

.btn--block {
  width: 100%;
}

/* === Section Titles === */
.section-title {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
  text-align: center;
}

.section-subtitle {
  font-size: 16px;
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: var(--space-2xl);
}

/* === Card === */
.card {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

/* === Badge === */
.badge {
  display: inline-flex;
  align-items: center;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: var(--radius-full);
}

.badge--primary {
  background: var(--color-primary-bg);
  color: var(--color-primary);
}

.badge--success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.badge--warning {
  background: var(--color-primary-bg);
  color: var(--color-warning);
}

/* === Dividers === */
.divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-lg) 0;
}

/* === Page Section === */
.page-section {
  padding: var(--space-4xl) 0;
}

/* === Breadcrumb === */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 14px;
  color: var(--color-text-muted);
  padding: var(--space-md) 0;
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb span {
  color: var(--color-text);
  font-weight: 500;
}

/* === Mobile Header === */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.mobile-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--space-md);
  height: 52px;
}

.mobile-header__back {
  display: flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary);
  font-size: 15px;
  font-weight: 500;
}

.mobile-header__title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-dark);
}

.mobile-header__action {
  color: var(--color-text);
}

/* === Bottom Tab Bar (Mobile) === */
.tab-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  padding: 6px 0 env(safe-area-inset-bottom, 0);
}

.tab-bar__inner {
  display: flex;
  align-items: center;
  justify-content: space-around;
}

.tab-bar__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: 4px 12px;
  font-size: 10px;
  color: var(--color-text-light);
  transition: color var(--transition-fast);
}

.tab-bar__item.active {
  color: var(--color-primary);
}

.tab-bar__item .icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
}

/* ============================================
   Responsive (Mobile)
   ============================================ */

@media (max-width: 768px) {
  .header {
    display: none;
  }

  .mobile-header {
    display: block;
  }

  .tab-bar {
    display: block;
  }

  body {
    padding-top: 52px;
    padding-bottom: 60px;
  }

  .container {
    padding: 0 var(--space-md);
  }

  .section-title {
    font-size: 24px;
  }

  .section-subtitle {
    font-size: 14px;
    margin-bottom: var(--space-xl);
  }

  .page-section {
    padding: var(--space-2xl) 0;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }

  .btn--lg {
    padding: 14px 24px;
    font-size: 15px;
  }

  .desktop-only {
    display: none !important;
  }

  .mobile-only {
    display: block !important;
  }
}

@media (min-width: 769px) {
  .mobile-only {
    display: none !important;
  }
}

/* ============================================
   Home Page (index.html)
   ============================================ */

/* === Hero === */
.hero {
  position: relative;
  background: linear-gradient(135deg, var(--color-dark) 0%, #1E3A5F 40%, #D97706 100%);
  overflow: hidden;
  padding: var(--space-4xl) 0;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(217,119,6,0.3) 0%, transparent 60%);
}

.hero__content {
  position: relative;
  display: flex;
  align-items: center;
  gap: var(--space-4xl);
  z-index: 1;
}

.hero__text {
  flex: 1;
  max-width: 560px;
}

.hero__title {
  font-family: var(--font-heading);
  font-size: 52px;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.2;
  margin-bottom: var(--space-md);
}

.hero__subtitle {
  font-size: 20px;
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  margin-bottom: var(--space-md);
}

.hero__desc {
  font-size: 16px;
  color: rgba(255,255,255,0.65);
  line-height: 1.8;
  margin-bottom: var(--space-xl);
}

.hero__btns {
  display: flex;
  gap: var(--space-md);
}

.hero__books {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Book Stack */
.book-stack {
  position: relative;
  width: 420px;
  height: 380px;
}

.book-stack__item {
  position: absolute;
  border-radius: 6px 16px 16px 6px;
  box-shadow: var(--shadow-xl);
  display: flex;
  align-items: flex-end;
  justify-content: flex-end;
  writing-mode: vertical-rl;
  padding: 24px 14px;
}

.book-stack__item--left {
  width: 150px;
  height: 215px;
  background: linear-gradient(135deg, #E74C3C, #C0392B);
  left: 40px;
  top: 80px;
  z-index: 1;
  transform: rotate(-5deg);
}

.book-stack__item--center {
  width: 180px;
  height: 255px;
  background: linear-gradient(135deg, var(--color-dark), #1E3A5F);
  left: 120px;
  top: 50px;
  z-index: 3;
}

.book-stack__item--right {
  width: 150px;
  height: 215px;
  background: linear-gradient(135deg, #8B5E3C, #6B3A2A);
  left: 210px;
  top: 80px;
  z-index: 2;
  transform: rotate(5deg);
}

.book-label {
  color: rgba(255,255,255,0.9);
  font-family: var(--font-heading);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: 6px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

/* === Categories === */
.categories__grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: var(--space-md);
}

.category-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-xl) var(--space-md);
  border-radius: var(--radius-lg);
  background: var(--color-white);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-fast);
  text-decoration: none;
}

.category-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.category-card__icon {
  font-size: 36px;
}

.category-card__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-text);
}

.category-card--lit { border-top: 3px solid #E74C3C; }
.category-card--society { border-top: 3px solid #3498DB; }
.category-card--biz { border-top: 3px solid #D97706; }
.category-card--kids { border-top: 3px solid #27AE60; }
.category-card--life { border-top: 3px solid #8E44AD; }
.category-card--exam { border-top: 3px solid #2C3E50; }

/* === Books Grid === */
.books-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.book-card {
  text-decoration: none;
  color: inherit;
}

.book-card__cover {
  aspect-ratio: 3/4;
  width: 100%;
}

.book-card__cover--book1 { background: linear-gradient(135deg, #0F172A, #1E3A5F); }
.book-card__cover--book2 { background: linear-gradient(135deg, #8B5E3C, #6B3A2A); }
.book-card__cover--book3 { background: linear-gradient(135deg, #1A1A2E, #16213E); }
.book-card__cover--book4 { background: linear-gradient(135deg, #2E4A1E, #1A3A0E); }

.book-card__info {
  padding: var(--space-md);
}

.book-card__title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 4px;
}

.book-card__author {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.book-card__price {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-sm);
}

.price--current {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
}

.price--original {
  font-size: 13px;
  color: var(--color-text-light);
  text-decoration: line-through;
}

/* === Features === */
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.feature-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.feature-card__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-md);
  background: var(--color-primary-bg);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-card__icon img {
  width: 28px;
  height: 28px;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--color-dark);
}

.feature-card p {
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* === Delivery Zones === */
.zones__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  max-width: 800px;
  margin: 0 auto;
}

.zone-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
}

.zone-item__check {
  width: 20px;
  height: 20px;
}

.zones__grid .zone-item:last-child {
  grid-column: span 2;
  justify-content: center;
  max-width: 50%;
  margin: 0 auto;
}

/* === FAQ === */
.faq__list {
  max-width: 720px;
  margin: 0 auto;
}

.faq__item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-sm);
  box-shadow: var(--shadow-sm);
}

.faq__question {
  padding: var(--space-lg);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-dark);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
}

.faq__question::after {
  content: '▾';
  font-size: 14px;
  color: var(--color-text-muted);
  transition: transform var(--transition-fast);
}

details[open] .faq__question::after {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.faq__question::-webkit-details-marker {
  display: none;
}

.faq__answer {
  padding: 0 var(--space-lg) var(--space-lg);
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* === CTA === */
.cta__banner {
  background: linear-gradient(135deg, var(--color-dark), #D97706);
  border-radius: var(--radius-xl);
  padding: var(--space-4xl);
  text-align: center;
}

.cta__banner h2 {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-md);
}

.cta__banner p {
  font-size: 18px;
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--space-xl);
}

/* ============================================
   Home Page - Mobile
   ============================================ */

@media (max-width: 768px) {
  .hero {
    padding: var(--space-2xl) 0;
  }

  .hero__content {
    flex-direction: column;
    gap: var(--space-xl);
    text-align: center;
  }

  .hero__title {
    font-size: 32px;
  }

  .hero__subtitle {
    font-size: 16px;
  }

  .hero__desc {
    font-size: 14px;
  }

  .hero__btns {
    justify-content: center;
    flex-wrap: wrap;
  }

  .hero__books {
    order: -1;
  }

  .book-stack {
    width: 280px;
    height: 250px;
  }

  .book-stack__item--left {
    width: 100px;
    height: 145px;
    left: 25px;
    top: 55px;
  }

  .book-stack__item--center {
    width: 120px;
    height: 170px;
    left: 80px;
    top: 35px;
  }

  .book-stack__item--right {
    width: 100px;
    height: 145px;
    left: 140px;
    top: 55px;
  }

  .book-label {
    font-size: 13px;
    letter-spacing: 3px;
  }

  .categories__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .category-card {
    padding: var(--space-md);
  }

  .category-card__icon {
    font-size: 28px;
  }

  .books-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
  }

  .features__grid {
    grid-template-columns: 1fr;
  }

  .zones__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .zones__grid .zone-item:last-child {
    grid-column: span 2;
    max-width: 100%;
  }

  .cta__banner {
    padding: var(--space-2xl) var(--space-lg);
  }

  .cta__banner h2 {
    font-size: 24px;
  }

  .cta__banner p {
    font-size: 15px;
  }
}

/* ============================================
   Book Detail Page (detail.html)
   ============================================ */

/* === Main Layout === */
.book-detail__main {
  display: flex;
  gap: var(--space-4xl);
  margin-bottom: var(--space-4xl);
}

.book-detail__cover {
  flex-shrink: 0;
  width: 360px;
}

.book-cover-large {
  width: 100%;
  aspect-ratio: 3/4;
  background: linear-gradient(135deg, #0F172A, #1E3A5F);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  margin-bottom: var(--space-md);
}

.book-detail__tags {
  display: flex;
  gap: var(--space-sm);
}

.book-detail__info {
  flex: 1;
  padding-top: var(--space-md);
}

.book-detail__title {
  font-family: var(--font-heading);
  font-size: 36px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}

.book-detail__author {
  font-size: 16px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.book-detail__rating {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-lg);
}

.book-detail__price-row {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.book-detail__price {
  display: flex;
  align-items: baseline;
  gap: var(--space-sm);
}

.book-detail__price .price--current {
  font-size: 36px;
}

.book-detail__price .price--original {
  font-size: 16px;
}

.discount-badge {
  display: inline-block;
  padding: 4px 10px;
  background: #FEE2E2;
  color: #DC2626;
  font-size: 12px;
  font-weight: 700;
  border-radius: var(--radius-sm);
  writing-mode: vertical-rl;
}

.book-detail__delivery {
  margin-bottom: var(--space-xl);
}

.delivery-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) 0;
  font-size: 14px;
  color: var(--color-text-muted);
}

.book-detail__actions {
  display: flex;
  gap: var(--space-md);
}

/* === Description === */
.book-detail__desc {
  margin-bottom: var(--space-3xl);
}

.detail-section-title {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-primary);
  display: inline-block;
}

.book-detail__desc p {
  font-size: 15px;
  color: var(--color-text);
  line-height: 2;
  margin-bottom: var(--space-md);
}

/* === Specs Table === */
.book-detail__specs {
  margin-bottom: var(--space-3xl);
}

.specs-table {
  width: 100%;
  max-width: 600px;
  border-collapse: collapse;
}

.specs-table tr {
  border-bottom: 1px solid var(--color-border-light);
}

.specs-table th {
  width: 120px;
  text-align: left;
  padding: var(--space-sm) var(--space-md);
  font-size: 14px;
  color: var(--color-text-muted);
  font-weight: 500;
  background: #FAFAF9;
}

.specs-table td {
  padding: var(--space-sm) var(--space-md);
  font-size: 14px;
  color: var(--color-text);
}

.related-books {
  background: var(--color-white);
}

/* === Detail Page - Mobile === */
@media (max-width: 768px) {
  .book-detail__main {
    flex-direction: column;
    gap: var(--space-xl);
  }

  .book-detail__cover {
    width: 100%;
    max-width: 280px;
    margin: 0 auto;
  }

  .book-detail__title {
    font-size: 24px;
  }

  .book-detail__info {
    padding-top: 0;
  }

  .book-detail__actions {
    flex-direction: column;
  }

  .book-detail__actions .btn {
    width: 100%;
  }

  .book-detail__price .price--current {
    font-size: 28px;
  }

  .specs-table th {
    width: 90px;
  }
}

/* ============================================
   Cart Page (cart.html)
   ============================================ */

.cart-layout {
  display: grid;
  grid-template-columns: 1fr 360px;
  gap: var(--space-xl);
  align-items: start;
}

/* === Sections === */
.cart-section {
  padding: var(--space-lg);
}

.cart-section__header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}

.address-select {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
}

.address-select__detail {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.6;
}

/* === Cart Items === */
.cart-items {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.cart-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
}

.cart-item__select {
  flex-shrink: 0;
}

.cart-item__check {
  width: 24px;
  height: 24px;
}

.cart-item__cover {
  width: 80px;
  height: 110px;
  border-radius: var(--radius-sm);
  flex-shrink: 0;
}

.cart-item__cover--book1 { background: linear-gradient(135deg, #0F172A, #1E3A5F); }
.cart-item__cover--book2 { background: linear-gradient(135deg, #8B5E3C, #6B3A2A); }

.cart-item__info {
  flex: 1;
  min-width: 0;
}

.cart-item__info h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 2px;
}

.cart-item__author {
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.cart-item__price-row {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.cart-item__price-row .price--current {
  font-size: 15px;
}

.cart-item__price-row .price--original {
  font-size: 12px;
}

/* === Quantity === */
.cart-item__qty {
  display: flex;
  align-items: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.qty-btn {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--color-text);
  background: #FAFAF9;
  transition: background var(--transition-fast);
}

.qty-btn:hover {
  background: var(--color-border);
}

.qty-val {
  min-width: 36px;
  text-align: center;
  font-size: 14px;
  font-weight: 600;
}

.cart-item__total {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  min-width: 70px;
  text-align: right;
}

.cart-item__remove {
  font-size: 16px;
  color: var(--color-text-light);
  padding: 4px;
  transition: color var(--transition-fast);
}

.cart-item__remove:hover {
  color: var(--color-danger);
}

/* === Summary === */
.cart-summary {
  padding: var(--space-lg);
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

.cart-summary h3 {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-lg);
}

.cart-summary__row {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.cart-summary__row--discount {
  color: var(--color-success);
}

.cart-summary__total {
  display: flex;
  justify-content: space-between;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-lg);
}

.total-price {
  color: var(--color-primary);
  font-size: 24px;
}

.cart-summary__free {
  color: var(--color-success);
  font-weight: 600;
}

/* === Coupon === */
.coupon-entry {
  display: flex;
  gap: var(--space-sm);
  margin: var(--space-md) 0;
}

.coupon-entry input {
  flex: 1;
  padding: 8px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
}

.coupon-entry input:focus {
  outline: none;
  border-color: var(--color-primary);
}

/* === Cart - Mobile === */
@media (max-width: 768px) {
  .cart-layout {
    grid-template-columns: 1fr;
  }

  .cart-page .section-title {
    display: none;
  }

  .cart-item {
    flex-wrap: wrap;
    padding: var(--space-md);
    gap: var(--space-sm);
  }

  .cart-item__info {
    min-width: calc(100% - 120px);
  }

  .cart-item__info h4 {
    font-size: 15px;
    line-height: 1.4;
  }

  .cart-item__cover {
    width: 70px;
    height: 95px;
  }

  .cart-item__qty {
    margin-left: auto;
  }

  .cart-item__remove {
    flex-shrink: 0;
  }

  .cart-item__total {
    display: none;
  }

  .cart-summary {
    position: static;
    border-radius: var(--radius-lg);
  }
}

/* ============================================
   Order Tracking Page (order.html)
   ============================================ */

.order-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.order-info-card {
  grid-column: 1 / -1;
  padding: var(--space-lg);
}

.order-info__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}

.order-info__header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-dark);
}

.order-info__header > div {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.order-info__time {
  font-size: 14px;
  color: var(--color-text-muted);
}

/* === Delivery Map === */
.delivery-map {
  background: #F0F9FF;
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  position: relative;
  min-height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.delivery-map__bg {
  position: relative;
  width: 100%;
  max-width: 500px;
}

.map-marker {
  width: 32px;
  height: 32px;
  position: absolute;
}

.map-marker--start {
  left: 10%;
  top: 50%;
  transform: translateY(-50%);
  filter: hue-rotate(200deg);
}

.map-marker--end {
  right: 10%;
  top: 50%;
  transform: translateY(-50%);
}

.map-route {
  width: 100%;
  position: absolute;
  top: 50%;
  left: 0;
}

/* === Timeline === */
.order-timeline {
  padding: var(--space-lg);
}

.timeline-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: var(--space-lg);
}

.timeline {
  position: relative;
}

.timeline__item {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.timeline__dot {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--color-border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  border: 3px solid #E7E5E4;
}

.timeline__dot--active {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

.timeline__item--done .timeline__dot {
  background: var(--color-success);
  border-color: var(--color-success);
}

.timeline__icon {
  width: 16px;
  height: 16px;
}

.timeline__connector {
  width: 3px;
  height: 32px;
  background: #E7E5E4;
  margin-left: 16.5px;
  margin-top: 4px;
  margin-bottom: 4px;
}

.timeline__connector--done {
  background: var(--color-primary);
}

.timeline__content {
  padding-top: 6px;
}

.timeline__content h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 2px;
}

.timeline__content p {
  font-size: 13px;
  color: var(--color-text-muted);
}

.timeline__item--active .timeline__content h4 {
  color: var(--color-primary);
}

/* === Rider Info === */
.rider-info {
  grid-column: 1 / -1;
  padding: var(--space-md) var(--space-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.rider-info__avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--color-primary-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  flex-shrink: 0;
}

.rider-info__detail {
  flex: 1;
}

.rider-info__detail h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-dark);
}

.rider-info__detail p {
  font-size: 13px;
  color: var(--color-text-muted);
}

/* === Order Products === */
.order-products {
  grid-column: 1 / -1;
  padding: var(--space-lg);
}

.order-product-item {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border-light);
}

.order-product-item:last-of-type {
  border-bottom: none;
}

.order-product__info {
  flex: 1;
}

.order-product__info h4 {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-dark);
}

.order-product__info p {
  font-size: 13px;
  color: var(--color-text-muted);
}

.order-product__price {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.order-summary-line {
  display: flex;
  justify-content: space-between;
  font-size: 14px;
  color: var(--color-text-muted);
  margin-bottom: 6px;
}

.order-summary-line--total {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-dark);
  margin-top: var(--space-sm);
}

/* === Order - Mobile === */
@media (max-width: 768px) {
  .order-layout {
    grid-template-columns: 1fr;
  }

  .order-info__header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-sm);
  }

  .delivery-map {
    min-height: 150px;
  }
}

/* ============================================
   Login Page (login.html)
   ============================================ */

.login-page {
  min-height: calc(100vh - var(--header-height));
  display: flex;
}

.login-layout {
  display: flex;
  flex: 1;
  width: 100%;
}

/* === Brand Side === */
.login-brand {
  flex: 1;
  background: linear-gradient(135deg, var(--color-dark) 0%, #1E3A5F 60%, #D97706 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.login-brand::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(217,119,6,0.25) 0%, transparent 60%);
}

.login-brand__content {
  position: relative;
  text-align: center;
  color: var(--color-white);
  padding: var(--space-3xl);
}

.login-brand__icon {
  margin-bottom: var(--space-lg);
}

.login-brand__content h1 {
  font-family: var(--font-heading);
  font-size: 42px;
  font-weight: 800;
  margin-bottom: var(--space-sm);
}

.login-brand__content > p {
  font-size: 18px;
  color: rgba(255,255,255,0.7);
  margin-bottom: var(--space-2xl);
}

.login-brand__features {
  text-align: left;
  display: inline-block;
}

.login-brand__features li {
  font-size: 15px;
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--space-md);
}

.login-brand__features li span {
  color: #10B981;
  margin-right: var(--space-sm);
  font-weight: 700;
}

/* === Form Side === */
.login-form {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
}

.login-form__inner {
  width: 100%;
  max-width: 400px;
  padding: var(--space-3xl);
}

.login-form__inner h2 {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}

.login-form__sub {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}

/* === Form Fields === */
.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.phone-input {
  display: flex;
  gap: var(--space-sm);
}

.area-code {
  width: 90px;
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  font-size: 14px;
  color: var(--color-text);
  cursor: pointer;
}

.phone-input input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  color: var(--color-text);
}

.phone-input input:focus,
.code-input input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}

.code-input {
  display: flex;
  gap: var(--space-sm);
}

.code-input input {
  flex: 1;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
}

.code-btn {
  white-space: nowrap;
  min-width: 110px;
}

/* === Agree === */
.login-form__agree {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 13px;
  color: var(--color-text-muted);
  margin: var(--space-lg) 0;
}

.login-form__agree input {
  accent-color: var(--color-primary);
}

.login-form__agree a {
  color: var(--color-primary);
}

/* === Divider === */
.login-form__divider {
  text-align: center;
  position: relative;
  margin: var(--space-xl) 0;
}

.login-form__divider::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 100%;
  height: 1px;
  background: var(--color-border);
}

.login-form__divider span {
  position: relative;
  background: var(--color-bg);
  padding: 0 var(--space-md);
  font-size: 13px;
  color: var(--color-text-light);
}

/* === Social Login === */
.login-form__social {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

.social-btn {
  padding: 12px 32px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-white);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.social-btn:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
}

/* === Login - Mobile === */
@media (max-width: 768px) {
  .login-layout {
    flex-direction: column;
  }

  .login-brand {
    display: none;
  }

  .login-form {
    flex: 1;
    align-items: flex-start;
    padding-top: var(--space-2xl);
  }

  .login-form__inner {
    padding: var(--space-lg);
  }

  .login-form__inner h2 {
    font-size: 24px;
  }

  .mobile-brand-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    margin-bottom: var(--space-xl);
  }

  .mobile-brand-header .login-brand__icon {
    margin-bottom: var(--space-sm);
  }
}

/* ============================================
   Shared: Page Header (new-books, category, promo, about)
   ============================================ */
.page-header {
  background: linear-gradient(135deg, var(--color-dark), #1E3A5F);
  color: white;
  padding: var(--space-3xl) 0;
}
.page-header--new-books { background: linear-gradient(135deg, #0F172A 0%, #1E3A5F 60%, #2563EB 100%); }
.page-header--category { background: linear-gradient(135deg, #0F172A 0%, #1E3A5F 60%, #7C3AED 100%); }
.page-header .breadcrumb { padding: 0 0 var(--space-md); color: rgba(255,255,255,0.6); }
.page-header .breadcrumb a { color: rgba(255,255,255,0.7); }
.page-header .breadcrumb a:hover { color: var(--color-primary-light); }
.page-header .breadcrumb span { color: rgba(255,255,255,0.85); }
.page-header__title {
  font-family: var(--font-heading);
  font-size: 40px;
  font-weight: 800;
  margin-bottom: var(--space-sm);
}
.page-header__desc { font-size: 17px; color: rgba(255,255,255,0.7); max-width: 500px; }

/* ============================================
   New Books Page (new-books.html)
   ============================================ */

/* Filter area */
.new-books__filters {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-xl);
  flex-wrap: wrap;
}
.filter-chip {
  padding: 8px 20px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text-muted);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.filter-chip:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-chip.active { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.ml-auto { margin-left: auto; }

.sort-select {
  padding: 8px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-full);
  font-size: 14px;
  color: var(--color-text);
  background: var(--color-white);
  cursor: pointer;
  outline: none;
}
.sort-select:focus { border-color: var(--color-primary); }

/* NEW tag on book cover */
.book-new-tag {
  position: absolute;
  top: 8px;
  right: 8px;
  background: linear-gradient(135deg, #3B82F6, #2563EB);
  color: white;
  font-size: 10px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 4px;
  letter-spacing: 1px;
}
.book-card__cover { position: relative; border-radius: var(--radius-sm); }
.book-card__meta { margin-bottom: var(--space-sm); }
.book-card__date {
  font-size: 12px;
  color: var(--color-text-light);
}

/* Extended cover colors */
.book-card__cover--c1 { background: linear-gradient(135deg, #1A3A5C, #2E6B8A); }
.book-card__cover--c2 { background: linear-gradient(135deg, #4A3728, #6B5B3A); }
.book-card__cover--c3 { background: linear-gradient(135deg, #3D1E3D, #6B3A5A); }
.book-card__cover--c4 { background: linear-gradient(135deg, #2C1810, #5C3A28); }
.book-card__cover--c5 { background: linear-gradient(135deg, #1E3A1E, #3A6B3A); }
.book-card__cover--c6 { background: linear-gradient(135deg, #2A1A3E, #4A3A6B); }
.book-card__cover--c7 { background: linear-gradient(135deg, #3E2A1A, #6B4A2A); }
.book-card__cover--c8 { background: linear-gradient(135deg, #1A2E3E, #3A5E6B); }

.books-grid--large { grid-template-columns: repeat(4, 1fr); }

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  margin-top: var(--space-2xl);
}
.pagination__btn {
  min-width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.pagination__btn:hover:not(.pagination__btn--disabled):not(.pagination__btn--active) {
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.pagination__btn--active { background: var(--color-primary); color: white; border-color: var(--color-primary); }
.pagination__btn--disabled { opacity: 0.4; cursor: not-allowed; }
.pagination__dots { color: var(--color-text-muted); padding: 0 var(--space-sm); }

/* ============================================
   Category Browse Page (category.html)
   ============================================ */

.category-layout {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: var(--space-xl);
  align-items: start;
}

/* Sidebar */
.category-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: var(--space-lg);
}
.sidebar__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}
.sidebar__header h3 { font-size: 17px; font-weight: 700; color: var(--color-dark); }
.sidebar__close { font-size: 18px; color: var(--color-text-muted); }

.sidebar__nav { margin-bottom: var(--space-lg); }
.sidebar__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}
.sidebar__link:hover { background: var(--color-primary-bg); color: var(--color-primary); }
.sidebar__link.active { background: var(--color-primary-bg); color: var(--color-primary); font-weight: 600; }
.sidebar__count { font-size: 12px; color: var(--color-text-light); font-weight: 400; background: var(--color-border-light); padding: 2px 8px; border-radius: var(--radius-full); }

.sidebar__section {
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
  margin-bottom: var(--space-md);
}
.sidebar__section h4 { font-size: 14px; font-weight: 600; color: var(--color-dark); margin-bottom: var(--space-sm); }

.sidebar__price-range {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}
.price-input {
  width: 80px;
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 13px;
  outline: none;
}
.price-input:focus { border-color: var(--color-primary); }

.sidebar__rating-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}
.rating-option {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 13px;
  color: var(--color-text);
  cursor: pointer;
}
.rating-option input { accent-color: var(--color-primary); }

.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 150;
}

/* Toolbar */
.category-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  margin-bottom: var(--space-lg);
}
.toolbar__left { display: flex; align-items: center; gap: var(--space-md); }
.toolbar__count { font-size: 14px; color: var(--color-text-muted); }
.toolbar__count strong { color: var(--color-text); }
.toolbar__view { display: flex; gap: 4px; }
.view-btn {
  width: 34px;
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 16px;
  color: var(--color-text-muted);
  cursor: pointer;
  transition: all var(--transition-fast);
}
.view-btn:hover, .view-btn.active { border-color: var(--color-primary); color: var(--color-primary); background: var(--color-primary-bg); }

.books-grid--col3 { grid-template-columns: repeat(3, 1fr); }

/* Book card rating */
.book-card__rating {
  font-size: 12px;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

/* Category sections */
.category-sections { margin-top: var(--space-3xl); }
.category-block { margin-bottom: var(--space-2xl); }
.category-block__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-md);
}
.category-block__header h2 {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-dark);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}
.category-block__tag {
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: var(--radius-full);
  background: #FEE2E2;
  color: #DC2626;
}
.category-block__more { font-size: 14px; color: var(--color-primary); font-weight: 500; }

/* ============================================
   Promo / Flash Sale Page (promo.html)
   ============================================ */

/* Promo Hero */
.promo-hero {
  position: relative;
  background: linear-gradient(135deg, #DC2626 0%, #991B1B 40%, #D97706 100%);
  overflow: hidden;
  padding: var(--space-4xl) 0;
}
.promo-hero__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 70% 50%, rgba(251,191,36,0.3) 0%, transparent 60%);
}
.promo-hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-4xl);
}
.promo-hero__text { flex: 1; }
.promo-hero__tag {
  display: inline-block;
  padding: 4px 14px;
  background: rgba(255,255,255,0.15);
  color: white;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}
.promo-hero__title {
  font-family: var(--font-heading);
  font-size: 52px;
  font-weight: 800;
  color: white;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}
.promo-hero__desc {
  font-size: 18px;
  color: rgba(255,255,255,0.8);
  margin-bottom: var(--space-xl);
}

/* Countdown */
.promo-countdown {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}
.countdown-label { color: rgba(255,255,255,0.7); font-size: 14px; }
.countdown-timer { display: flex; align-items: center; gap: var(--space-sm); }
.countdown-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}
.countdown-num {
  font-family: var(--font-mono);
  font-size: 32px;
  font-weight: 800;
  color: white;
  background: rgba(0,0,0,0.3);
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  min-width: 52px;
  text-align: center;
}
.countdown-unit { font-size: 12px; color: rgba(255,255,255,0.7); margin-top: 4px; }
.countdown-sep { font-size: 28px; font-weight: 700; color: rgba(255,255,255,0.7); }

/* Promo book stack */
.promo-hero__visual { flex-shrink: 0; }
.promo-book-stack { position: relative; width: 260px; height: 300px; }
.promo-book {
  position: absolute;
  border-radius: 6px 14px 14px 6px;
  box-shadow: var(--shadow-xl);
}
.promo-book--1 {
  width: 100px; height: 150px;
  background: linear-gradient(135deg, #0F172A, #1E3A5F);
  left: 20px; top: 60px;
  transform: rotate(-8deg);
  z-index: 1;
}
.promo-book--2 {
  width: 120px; height: 175px;
  background: linear-gradient(135deg, #8B5E3C, #6B3A2A);
  left: 70px; top: 40px;
  z-index: 3;
}
.promo-book--3 {
  width: 100px; height: 150px;
  background: linear-gradient(135deg, #E74C3C, #C0392B);
  left: 130px; top: 60px;
  transform: rotate(8deg);
  z-index: 2;
}
.promo-discount-badge {
  position: absolute;
  bottom: 20px;
  right: 10px;
  width: 70px;
  height: 70px;
  background: #FBBF24;
  color: #92400E;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 900;
  z-index: 5;
  box-shadow: var(--shadow-lg);
  animation: pulse-badge 2s infinite;
}
@keyframes pulse-badge {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.08); }
}

/* Discount Tiers */
.promo-tiers__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}
.promo-tier-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-md);
  border-radius: var(--radius-lg);
  color: white;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
.promo-tier-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-xl); }
.promo-tier-card--50 { background: linear-gradient(135deg, #DC2626, #991B1B); }
.promo-tier-card--60 { background: linear-gradient(135deg, #D97706, #B45309); }
.promo-tier-card--70 { background: linear-gradient(135deg, #2563EB, #1E40AF); }
.promo-tier-card--80 { background: linear-gradient(135deg, #7C3AED, #5B21B6); }
.tier-num { font-size: 56px; font-weight: 900; line-height: 1; }
.tier-unit { font-size: 24px; font-weight: 700; }
.tier-desc { font-size: 14px; opacity: 0.9; margin: var(--space-sm) 0 var(--space-md); }
.tier-link { font-size: 14px; font-weight: 600; text-decoration: underline; }

/* Flash Sale */
.flash-sale { background: var(--color-white); }
.flash-sale__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-lg);
}
.flash-sale__title-row { display: flex; align-items: center; gap: var(--space-md); }
.flash-sale__title { font-size: 24px; font-weight: 700; color: var(--color-dark); }
.flash-sale__countdown { font-size: 14px; color: var(--color-danger); }
.countdown-inline {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: #DC2626;
  background: #FEE2E2;
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  margin-left: 4px;
}
.flash-sale__more { font-size: 14px; color: var(--color-primary); font-weight: 500; }

.flash-sale__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
}

.flash-item { padding: var(--space-md); }
.flash-item__cover {
  aspect-ratio: 3/4;
  border-radius: var(--radius-sm);
  margin-bottom: var(--space-sm);
  position: relative;
}
.flash-item__cover--1 { background: linear-gradient(135deg, #0F172A, #1E3A5F); }
.flash-item__cover--2 { background: linear-gradient(135deg, #8B5E3C, #6B3A2A); }
.flash-item__cover--3 { background: linear-gradient(135deg, #1A1A2E, #16213E); }
.flash-item__cover--4 { background: linear-gradient(135deg, #2E4A1E, #1A3A0E); }
.flash-item__discount {
  position: absolute;
  top: 8px;
  left: 8px;
  background: #DC2626;
  color: white;
  font-size: 11px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 4px;
}
.flash-item__info h4 { font-size: 16px; font-weight: 600; color: var(--color-dark); margin-bottom: 2px; }
.flash-item__author { font-size: 12px; color: var(--color-text-muted); margin-bottom: var(--space-sm); }
.flash-item__price { margin-bottom: var(--space-sm); }
.flash-item__price .price--current { font-size: 20px; color: #DC2626; }
.flash-item__price .price--original { font-size: 13px; }

/* Progress bar */
.progress-bar {
  height: 6px;
  background: var(--color-border-light);
  border-radius: var(--radius-full);
  margin-bottom: 4px;
  overflow: hidden;
}
.progress-bar__fill {
  height: 100%;
  background: linear-gradient(90deg, #DC2626, #F97316);
  border-radius: var(--radius-full);
}
.flash-item__stock { font-size: 12px; color: var(--color-text-muted); display: block; margin-bottom: var(--space-sm); }
.flash-item__stock--low { color: #DC2626; font-weight: 600; }

/* Sale tag on book cards */
.book-card__sale-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: #DC2626;
  color: white;
  font-size: 10px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: 4px;
}

/* Coupon banner */
.coupon-banner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-lg);
  background: linear-gradient(135deg, #FEF3C7, #FDE68A);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
}
.coupon-banner__text h3 { font-size: 20px; font-weight: 700; color: var(--color-dark); margin-bottom: var(--space-sm); }
.coupon-banner__text p { font-size: 15px; color: var(--color-text-muted); }
.coupon-banner__text strong { color: var(--color-primary); }

/* ============================================
   About Page (about.html)
   ============================================ */

/* About Hero */
.about-hero {
  background: linear-gradient(135deg, var(--color-dark) 0%, #1E3A5F 60%, #0F766E 100%);
  padding: var(--space-4xl) 0;
  color: white;
}
.about-hero__inner { text-align: center; }
.about-hero__text h1 {
  font-family: var(--font-heading);
  font-size: 44px;
  font-weight: 800;
  margin-bottom: var(--space-sm);
}
.about-hero__text p { font-size: 18px; color: rgba(255,255,255,0.7); margin-bottom: var(--space-2xl); }
.about-hero__stats {
  display: flex;
  justify-content: center;
  gap: var(--space-3xl);
  max-width: 700px;
  margin: 0 auto;
}
.about-stat { text-align: center; }
.about-stat__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 800;
  color: var(--color-primary-light);
}
.about-stat__label { font-size: 14px; color: rgba(255,255,255,0.65); margin-top: 4px; }

/* Brand Story */
.about-story__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}
.about-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  background: var(--color-primary-bg);
  padding: 4px 14px;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-md);
}
.about-story__text h2 {
  font-family: var(--font-heading);
  font-size: 32px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-lg);
}
.about-story__text p {
  font-size: 15px;
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: var(--space-md);
}

/* Story illustration */
.about-story__illustration {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
  padding: var(--space-lg);
}
.about-story__book {
  aspect-ratio: 3/4;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
}
.about-story__book:nth-child(1) { background: linear-gradient(135deg, #0F172A, #1E3A5F); transform: rotate(-3deg); }
.about-story__book:nth-child(2) { background: linear-gradient(135deg, #8B5E3C, #6B3A2A); transform: rotate(2deg); }
.about-story__book:nth-child(3) { background: linear-gradient(135deg, #DC2626, #991B1B); transform: rotate(-1deg); }
.about-story__book:nth-child(4) { background: linear-gradient(135deg, #047857, #065F46); transform: rotate(3deg); }

/* Values */
.about-values__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}
.about-value-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background: #FFFBEB;
  border-radius: var(--radius-lg);
  transition: transform var(--transition-fast);
}
.about-value-card:hover { transform: translateY(-4px); }
.about-value-card__icon { font-size: 44px; margin-bottom: var(--space-md); }
.about-value-card h3 { font-size: 18px; font-weight: 700; color: var(--color-dark); margin-bottom: var(--space-sm); }
.about-value-card p { font-size: 14px; color: var(--color-text-muted); line-height: 1.7; }

/* Highlights */
.about-highlights__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  max-width: 800px;
  margin: 0 auto;
}
.about-highlight-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.highlight-icon { font-size: 32px; flex-shrink: 0; }
.about-highlight-item h4 { font-size: 16px; font-weight: 600; color: var(--color-dark); margin-bottom: 4px; }
.about-highlight-item p { font-size: 14px; color: var(--color-text-muted); line-height: 1.6; }

/* Timeline */
.about-timeline__list {
  max-width: 600px;
  margin: 0 auto;
  position: relative;
  padding-left: 40px;
}
.about-timeline__list::before {
  content: '';
  position: absolute;
  left: 15px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--color-border);
}
.timeline-entry {
  position: relative;
  padding-bottom: var(--space-xl);
}
.timeline-entry:last-child { padding-bottom: 0; }
.timeline-entry__dot {
  position: absolute;
  left: -33px;
  top: 4px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid #FFFBEB;
  z-index: 1;
}
.timeline-entry--future .timeline-entry__dot { background: var(--color-border); border-color: #FFFBEB; }
.timeline-entry__content { padding-left: var(--space-md); }
.timeline-entry__date {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  display: block;
  margin-bottom: 4px;
}
.timeline-entry--future .timeline-entry__date { color: var(--color-text-light); }
.timeline-entry__content h4 { font-size: 18px; font-weight: 700; color: var(--color-dark); margin-bottom: 4px; }
.timeline-entry__content p { font-size: 14px; color: var(--color-text-muted); }

/* Contact */
.about-contact__card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
  background: var(--color-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  padding: var(--space-2xl);
}
.about-contact__info h2 {
  font-family: var(--font-heading);
  font-size: 28px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-sm);
}
.about-contact__info > p {
  font-size: 15px;
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
}
.about-contact__items { display: flex; flex-direction: column; gap: var(--space-lg); }
.contact-item { display: flex; align-items: flex-start; gap: var(--space-md); }
.contact-item__icon { font-size: 24px; flex-shrink: 0; width: 32px; text-align: center; }
.contact-item h4 { font-size: 14px; font-weight: 600; color: var(--color-dark); margin-bottom: 2px; }
.contact-item p { font-size: 14px; color: var(--color-text-muted); }

.about-contact__form h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: var(--space-lg);
}
.contact-form .form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}
.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  outline: none;
  font-family: inherit;
  transition: border-color var(--transition-fast);
}
.contact-form input:focus,
.contact-form textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px var(--color-primary-bg);
}
.contact-form .form-group { margin-bottom: var(--space-md); }

/* ============================================
   Responsive: New Pages
   ============================================ */

@media (max-width: 768px) {
  /* Page Header */
  .page-header { padding: var(--space-2xl) 0; }
  .page-header__title { font-size: 28px; }

  /* New Books */
  .new-books__filters { gap: var(--space-sm); overflow-x: auto; flex-wrap: nowrap; -webkit-overflow-scrolling: touch; padding-bottom: 4px; }
  .filter-chip { white-space: nowrap; flex-shrink: 0; font-size: 13px; padding: 6px 14px; }
  .filter-sort { margin-left: 0; }
  .books-grid--large { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }
  .pagination { gap: 4px; }
  .pagination__btn { min-width: 34px; height: 34px; font-size: 13px; }

  /* Category */
  .category-layout { grid-template-columns: 1fr; }
  .category-sidebar {
    position: fixed;
    left: -300px;
    top: 0;
    bottom: 0;
    width: 280px;
    z-index: 200;
    border-radius: 0;
    overflow-y: auto;
    transition: left var(--transition-normal);
    box-shadow: var(--shadow-xl);
  }
  .category-sidebar.open { left: 0; }
  .sidebar-overlay { display: block; }
  .category-sidebar.open + .sidebar-overlay { display: block; }
  .books-grid--col3 { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }
  .category-toolbar { flex-wrap: wrap; gap: var(--space-sm); }
  .category-block__header h2 { font-size: 18px; }

  /* Promo */
  .promo-hero__content { flex-direction: column; text-align: center; }
  .promo-hero__visual { order: -1; }
  .promo-hero__title { font-size: 32px; }
  .promo-countdown { justify-content: center; }
  .countdown-num { font-size: 22px; min-width: 40px; padding: 4px 8px; }
  .promo-tiers__grid { grid-template-columns: repeat(2, 1fr); }
  .tier-num { font-size: 40px; }
  .flash-sale__grid { grid-template-columns: repeat(2, 1fr); }
  .flash-sale__title { font-size: 18px; }
  .coupon-banner { flex-direction: column; text-align: center; padding: var(--space-lg); }

  /* About */
  .about-hero__text h1 { font-size: 28px; }
  .about-hero__stats { flex-wrap: wrap; gap: var(--space-xl); }
  .about-stat__num { font-size: 28px; }
  .about-story__grid { grid-template-columns: 1fr; }
  .about-story__text h2 { font-size: 24px; }
  .about-story__illustration { grid-template-columns: repeat(2, 1fr); max-width: 280px; margin: 0 auto; }
  .about-values__grid { grid-template-columns: repeat(2, 1fr); gap: var(--space-sm); }
  .about-highlights__grid { grid-template-columns: 1fr; }
  .about-contact__card { grid-template-columns: 1fr; padding: var(--space-lg); }
  .promo-book-stack { width: 200px; height: 240px; }
  .promo-book--1 { width: 75px; height: 110px; left: 15px; top: 50px; }
  .promo-book--2 { width: 90px; height: 130px; left: 55px; top: 35px; }
  .promo-book--3 { width: 75px; height: 110px; left: 100px; top: 50px; }
  .promo-discount-badge { width: 56px; height: 56px; font-size: 15px; bottom: 10px; right: 5px; }
}